Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

A significant late season heat wave continues in the interior Pacific Northwest for at least one more day before easing somewhat Friday into Saturday. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Thunderstorms with strong winds and hail are possible across portions of central and northern Wisconsin Sunday afternoon and early evening. Keep up with the latest forecast and make sure you have multiple methods to receive severe weather information.

Severe Weather Outlook for Sunday
Click map for more information

Local Hazardous Weather Outlook
^{Note: Product updated daily by 6 AM and as needed during the day.}

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FLUS43 KGRB 042004
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
304 PM CDT Thu Sep 4 2025

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-052015-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
304 PM CDT Thu Sep 4 2025

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

LMZ521-522-541>543-052015-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
304 PM CDT Thu Sep 4 2025

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

Gale force winds and building waves are expected late tonight,
bringing hazardous conditions to mariners. A Gale Warning has been
issued.

There is a small chance of thunderstorms late tonight.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

Gale force winds and large waves are expected to continue into
Friday morning. Conditions will likely remain hazardous for small
craft through Friday evening due to persistent gusty west winds
and high waves.

$$

Kotenberg

Here are some additional links to help monitor the weather:

Local Severe Weather Monitor
Additional Severe Weather Outlooks for U.S. - NWS Storm Prediction Center
Weather Safety
NWS Green Bay on Social Media

GRB RSS Feed

Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

Risk for Strong Thunderstorms on Sunday